Selecting the design of a one‐sided clamp for pulsed electrode wire feed

Лебедев, В. А.; Moshkin, V. F.; Pichak, V G; Smolyarko, V. B.

doi:10.1080/09507110109549432

Cited by 4 publications

(3 citation statements)

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“…Mechanisms with a programmable voltage supply motor [17]; 4. Mechanisms with a movable clamp on the basis of a quasi-wave inverter (QWI) [18,19]; 5. Feeders with a stepping electromotor; 6.…”

Section: Discussionmentioning

confidence: 99%

Systems to Control Molten Metal Transfer in Arc Welding

Filonov

Kryukov

Gusarov

2015

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The paper analyzes the systems used for controlling molten wire metal droplets during the arc welding process in shielding gases. The variations for implementing the relevant systems are given, with the positive and negative aspects of such implementation taken into account. Electrical systems are currently investigated to the fullest extent possible and implemented in different power sources for pulsed welding arc. Mechanical systems are represented by different types of feeders that provide the pulsed wire feeding process. The feed mechanisms driven by electric motors and electromagnets are analyzed. In addition to the mechanical and electrical systems, the examples of combined control systems are given. IntroductionMechanized and automatic consumable electrode arc welding is the basic technology to have a permanent joint. Gas-shielded metal arc welding is the most widely used in industries over the world.The developed and offered on the market consumable electrode welding techniques are constantly improved with the purpose to obtain joints having an optimal balance between geometry and metal quality, reduce the costs of further processing works, and reduce the consumption of material and energy resources. A number of features pertaining to the gas-shielded welding process depend on a type of electrode metal transfer.The transfer of wire electrode metal to a weld pool can normally be divided into three main stages. During the first stage a droplet of a specified size is formed at the electrode tip. Within the second stage the droplet's growth stops, and this droplet together with the electrode contact tip approaches to the weld pool. The third stage completes with the metal transfer to the pool when the bridge between the electrode tip and molten metal drop is destroyed.There are several variations of metal transfer in the AW process using gas shields; the basic types are featured as follows: with naturally occurring short circuits;  with continuous arcing and droplets or globs of metal transfer;  with continuous arcing and spray or rotating spray transfer of metal. The types of metal transfer as well as forces acting on a wire electrode metal while arcing are described in [1,2]. Each type of metal transfer has both advantages and disadvantages.

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Section: Discussionmentioning

confidence: 99%

Systems to Control Molten Metal Transfer in Arc Welding

Filonov

Kryukov

Gusarov

2015

IOP Conf. Ser.: Mater. Sci. Eng.

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“…As a rule, the functional dependence of the power change in most cases is provided by a programmable welding current source that implements a certain control law for the mode parameters. The use of programmed heat input into the weld pool due to periodic oscillations of the electrode relative to the item [9,10] or vice versa [11,12] complicates the modeling of the temperature field distribution in the base metal and the deposited layer. This is due to the fact that the function of change in the thermal power in the base metal is characterized by a large number of controllable parameters, which does not allow the use of known techniques for sources of variable power for calculating the distribution of heat in the weld and near-weld zone [13,14].…”

Section: Introductionmentioning

confidence: 99%

Modeling the Influence of Mechanical Control Impacts on the Distribution of the Temperature Field in the Base Metal during Surfacing with a Strip Electrode

Lavrova

Ivanov

Il’yaschenko

2022

SSP

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Modeling of the temperature distribution during electric arc surfacing with a strip electrode is carried out in relation to the design scheme of a semi-infinite body. Also, in the work, the temperature distribution was calculated when a flat layer was heated by a linear source, which made it possible to compare the temperature distribution data without and taking into account the heat release conditions at the product boundaries. The simulation results showed that the control of heat input into the base metal when using mechanical control actions makes it possible to reduce the overheating of the weld pool, reduce the area of the melting isotherm, and reduce the cooling rate of the heat-affected zone. By calculation, the previously determined optimal range of values of the frequency of control actions of 40÷60 Hz was confirmed, which makes it possible to ensure the minimum depth of penetration of the base metal and obtain a favorable structure in the heat-affected zone, prone to the formation of a coarse-grained structure.

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“…One of the ways to improve mechanized arc welding is the use of controlled electrode metal transfer, urging the separation and transfer of droplets into the weld pool. Existing mechanisms for pulsed wire feed, with the regulation of pulse parameters, like many such, are not applicable for welding submerged strip electrode with forced discharge electrode metal [1,2].…”

Section: Introductionmentioning

confidence: 99%